texture- the feel and look of a certain rock's surface. grains- what geologists call- the particles of minerals or other rocks that most rocks are made of. igneous rock- forms from the cooling of molten rock (either magma below or above the surface.) sedimentary rock- forms when the particles of other rocks or the remains of plants and animals are pressed and cemented together. metamorphic rock- forms when an existing rock is changed by heat, pressure, or chemical reactions.
Outline
How Geologist Classify Rocks
To classify rocks, geologist collect and study samples of rocks.
Table of Contents
5.1 Classifying Rocks
Vocabulary
texture- the feel and look of a certain rock's surface.
grains- what geologists call- the particles of minerals or other rocks that most rocks are made of.
igneous rock- forms from the cooling of molten rock (either magma below or above the surface.)
sedimentary rock- forms when the particles of other rocks or the remains of plants and animals are pressed and cemented together.
metamorphic rock- forms when an existing rock is changed by heat, pressure, or chemical reactions.
Outline
How Geologist Classify Rocks